It is 100th birthday of Alan Turing, famously known for the the Turing Machine and the one who has been highly influential in the development of Computer Science and modern computer architectures.
To know more about the work and person see http://en.wikipedia.org/wiki/Alan_Turing
Also the ACM (Association for Computing Machinery), gives the Turing Award for the most significant contribution to Computer Science that push the boundaries of innovation, and is considered the Nobel of Computer Science. Visit http://amturing.acm.org/ for more information and the people who are given this prestigious Award.
Google celebrates this day with a cool doodle :)